How to earn money with network traffic ads

I just had a chance to look in to mobfox.com site.
I also saw comarsion chart and looks far better than Admob ads by google. But the thing is I've already added admob ads to my app.

Here I also saw money through online traffic revenue earnings

Pleae could you check this below and explain me how I am going to ear money by taking some example based on online traffic
Monthly EU page impressions of your app: 1,000,000
Average EU CPC earnings: $0,20
Monthly US page impressions of your app: 500,000
Average US CPC earnings: $0,10
Average CTR (click-through-rate): 2%
Total revenue for your EU traffic: $4,000
Total revenue for your US traffic: $1,000
Total revenue with MobFox: $5,000
Total revenue with other ad networks: $2,000-$3,000

I could not understand the revenue through US traffic or EU traffic?
Can anyone know how do I earn by traffic?
So far I know that when user clicks on ads then I will earn some amount but this seems like new thing?
Thanks,
Sai